Electric switch



May 27, 1930. c. F. SCHWENNKER ELECTRIC SWITCH Filed May. 26; 1928 Inventor. Char-lea F Schwenn Ker His'. A-ttorneg.

V P iitentedlMay'ZZ 930 cHARL SFLsCHwEnNKER, or scnnNEo'r A'nY, nnw'yoax, AssIenoaro-enmsmn ELECTRIC comPAnY, A'QORPORATION or; nnw Yon.x-

i Emerald swrrcn Application flled' imfay 26, 1926. Serial nofatos'ze.

- My invention relates to electric switches and particularly to electric switches oftheliquid break explosion chamber type; It is an object of my invention to provide an improved electric switch of this character, the

' ,fixed contact of which may be readily -re'-,.

' moved and reinserted. Another object of my invention is the provision in. a'switch of this character of improved means of relieving the explosionchamb'er of a certain amountof gas through the contact supporting studs.

Other objects of myinvention will appear. F

as I proceed with the detailed descri t1on,'

My invention will be better un erstood,

from 'the following description taken in connection with the accompanying drawing, and its-scope will be pointed out in the appended claims.

- In the drawing Fig. 1 shows in 'longitudi- 6 nal' section a portion of a switch embodying my inventioni Fig.2 is a transverse section taken on the li'ne 22 of Fig. 1; Fig. 3 ma erspective view of the construction shown an l ig. l drawn to a smaller scale and w1th the carrier of thefixedcontact removed; and Fig.

4. shows the carrier removed. I

Referring tothe drawing the parts Illustrated are arranged to be immersed in an 1ns ulating liquid, as for example oil, contained in a-suitable vessel through the top of wh ch passes the conducting. stu' d 1 extending through the insulator bushing 2. Secured to the stud -1 isthe adapter or contactsupporting member 3 which is shaped to adapt a vertical fixed. contact to the inclination of the supporting stud. Both the'stud and-the adapter are shown as being hollow, the central openin therethrough forming a passage 4 for the dlscharge of gas to the exterior. of the enclosing vessel. Through the lugs 5 I extending from the sides of the adapter pass bolts 6 having nuts 7 on their upper ends and having their lower. ends firmly secured in the flange 8of the explosion chamber cas ing 9. In the bottom of this casing is mounted the usual throat bushing through which the movable contact or rod 10 of the switch is adapted to project. The chamber 'also has the usual lining 11 of insulatingmaterial and the exterior insulating shield 12.

.The fixed or socket'contact 14:- which receives I the contact rod 10. is preferably "segmental. I

in form andis shown provided with garter springs 15 for yieldingly pressing the segments against the rod;

The fixed contact is mou-ntedi'n the detach able carrier- 16 which is-shown as having-the general formof a, frustum of a cone having I i a height sufficient to permit it being readily moved laterally into position between the shownprovided'with the handle 17. The

adapte andthe explosion chamber casing.' v or convemence n mo'vmg the carrier it is I lower portion of thecarrier ,is-constructedas-a separate member 18 and has the curved portions-19 to which an arc-drawn-from the fixed contacts upon opening the circuit is;

transferred. The-contact carrier '16 thus forms'the topotltheexplosion chambercasing. Theadjustable stop serew 21 mounted in a lugon the flange 8 of easing Qlimits'the' rearward movement ofthe carrier when the same is pushed 1nto operative posltlon. The carrier-161s firmly secured 1n position and in good electrical contact with the adapter by t1 htenmgthe nuts 7, thus tightly clampmg t e carrier between the adapter and the explosion chamber casing. To remove the carrier, as for example, to inspect or renew the contacts therein, one need only to loosen the handle' 17 "withdrawthe carrier laterally.

the nuts 7 and by grasping For the purpose of releasing some of the gas produced inthe explosion chamber, par-' ticularly when the. switch is called upon to interrupt a heav load, I have formed the carrier with the gas discharge passage 25 extending longitudinally through the wall thereof. This passage is shown flared at the lower end in the part 18 and as terminatin at the upper-end in the recess 26 which communicates with the gas discharge passage 4 extending through the adapter and stud. By this construction a certain amount'of hot gas is allowed to 'escape'froni the'expl'osion' chamber through-the fixed contact carrier.

and stud but is kept out of actual contact with the fixed contact to prevent possible damage being done thereto. The small vent hole 27-. in the top of the carrier prevents theinterior cavity becoming air or gas locked and also v assists in permitting the escape of .oilfrom supporting member, an

the interior when the rod 10 enters the carrier. A I

. \Vhat I-claim as new and desire to secure by.;. L etters Patent of the United States is 1}: An electric switch comprising';cooperating fixed and movable contacts. separable in aninsulating liquid, an insulated contact explosion chamber asing secured to the member in spaced reiation thereto, and a contact carrier arranged to slide laterally to a position between the supporting member and the casing, said contact carrier adapted to be maintained in op-- erative position by clamping means common porting member,an explosion to said supporting member and easing.

2. An electric switch comprising cooperating fixed and movable contacts separable in an insulating liquid, an insulated contact supchamber casing secured-to the:-member--in spaced relation thereto, .and a detachableholder for the fixed rin'spaced relation thereto,

contact clamped between the member and the casing. I 1 I j I 3. In an electrieswit-chof the liquid break type, a contact supporting member, an exa laterally deuchable fixed contact carrier, andfmeansfor clamping the carrier vEtosion chamber casing secured to the mem in position between the a gas discharge passage type, an

tor stud therein, an adapter secured thereto insulator bushing having a conduc-'-" said stud and adapter each having a gas dis- I interiorof the explosion chamber casing and casing, and a fixed contact therein, said carrier having a gasdischarge passage therethrough arranged to convey gas plosion chamber past and out of contact with the-fixed contact tothe passageein thesupporting member.

In Witness whereof I have hereunto set my hand this 25thiday of May, 1928.

fixed contact, a detachable carrier enclosing the contact and iorming one fromthe ex- CHARLES F. SGHWENNKER,

member'andthe chamber, whereby loosening I i of said means is effective to permit lateral removalof the contact carrier.

4'. In an electric switch of the liquid break type, a contact supporting member having .a

gas discharge opening therethrough,- an explosion chamber casing, and a contact carrier arranged between the member and the caslng having a gas passage therethrough connecting at opposite ends with the opening in the supportmg member and with the interior of curing the carrier in the explosion chamber casing.

5. In an electric switch of the liquid break type, a contact supporting member having a gas discharge opening therethrough, an explosion chamber casing spaced from the supporting member, a detachable contact carrier having a portion forming one end of the explosionchamber casing and means for seposition between the supporting member and the casing. I

' 6. In an electric switch of the liquid break type, a contact supporting member having a gas discharge opening therethrough, an explosion chamber casing spaced from the supporting member, and a laterally removable contact carrier clamped between the support-- ing member and its explosion chamber casing, said contact carrier having a gas discharge passage extending therethrough and connecting at opposite ends with the explosion chamber casing'and the opening in t e supporting member.

7 In an electric sw tch of the liquid break 

